Visually there may not be much difference between the two, so unless you are sure of the parents genetics you would really have to prove out the animal to know for sure.
Look at the body on the left side you can see some white flecking in the bands, the one on top has none. They looked almost identical as hatchlings, as they are aging the tipping is starting to come out. That's why it's important to buy from someone you trust.

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"The band is just fantastic, that is really what I think. Oh by the way, which ones pink?"